Loans Receivable Held for Investment - Average of Loans Individually Evaluated for Impairment by Loan Type and Related Interest Income (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Impaired loans
Average Recorded Investment	$ 5,762	$ 8,708	$ 6,408	$ 8,867
Cash Basis Interest Income Recognized	412	126	545	315
Foregone interest income if impaired loans had performed according to terms	40	67	80	77
Single family
Impaired loans
Average Recorded Investment	638	620	640	622
Cash Basis Interest Income Recognized	5	7	15	15
Multi-family
Impaired loans
Average Recorded Investment	320	331	321	331
Cash Basis Interest Income Recognized	5	6	11	12
Church
Impaired loans
Average Recorded Investment	4,741	7,692	5,383	7,849
Cash Basis Interest Income Recognized	402	112	517	286
Commercial - other
Impaired loans
Average Recorded Investment	$ 63	65	64	65
Cash Basis Interest Income Recognized		$ 1	$ 2	$ 2

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- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

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- Definition

Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

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- Definition

Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18794-111554

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